Question about Mercury Mystique

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The HVAC fan on my 1998 Mercury Mystique doesn't always work and a mechanic says it's the ignition switch. The fan has been tested as well as the relay switch. The dash selector switch hasn't been tested but the mechanic said it's not the problem. That leaves the ignition system. He wiggled the ignition switch and got the fan to work giving him the idea that that switch has an issue. He says it's an expensive and extensive repair.

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Changing a switch is not an expensive nor extensive repair procedure. Even on your Merc, if I remember correctly, on the bottom back side from you is a small hole in the plastic cover that you can stick a bent straight paper clip into, with the switch in the proper position, maybe accessorie, and the paper clip will push a release button so you can pull the ignition switch right out. Don't let them get over on you friend. And putting in the new switch assembly is easier yet. just hold the assembly in the accessorie position and push it in. then turn it off and pull the key. You may have to call a locksmith to have a coded key made for it so it will start the car. I've gone to a scrap yard and pulled switches out in said manner. Takes a few seconds and out.

Posted on Jul 07, 2017

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Posted on Jan 02, 2017

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SOURCE: Heater Fan/Blower does not work.

what you need is a blower motor resistot

Posted on Dec 04, 2008

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SOURCE: Mitsubishi Galant 1995 ignition problem

its probably ign swich - located on end of ignition cylinder - round with 5 maybe 6 male terminals harness plugs into

Posted on Jan 11, 2009

kn1ckfan
  • 10 Answers

SOURCE: HVAC vent selector does not function. Air flow is

THe blend door seems to be stuck. When you change settings from defrost to floor air or, vent, the blend door opens and closes directing the air to the place you want it to go to. I have had some success spraying a lubricating oil such as WD40 under the dash on the blend door. You need to get under the dash with a flashlight to locate it. It looks like a flap. Spray it with a couple of shots of the WD40. Go easy on the spraying as you may be inhaling the fumes. Keep the doors and windows open to minimize the fumes. Wait about 1/2 hour and try the A/C functions. (defrost, floor, vent air)

Posted on Mar 09, 2009

  • 1 Answer

SOURCE: POwer windows won't work

The drivers side relay is in the door, left of the speaker. I took my whole door apart because the window would go down but not back up. All I would hear is a clicking noise coming form the relay. Do you have the same problem?

Posted on Jul 31, 2009

  • 4 Answers

SOURCE: 1997 Mercury mystique the engine cooling fan will not operate

it could be the engine coolant sensors on the thermostat housing it controls the fans when they work if your sensor is out you can unplug the sensor while running the motor and if they turn on after a moment(the fans)then the sensor is bad if not make sure your fans work by jumping power to them 12volt

Posted on Jun 25, 2010

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Only one window works. when I plug in master switch it blows fuse 23 to blower motor 98 mercury mystique


If you are mechanically inclined, disconnect the harness to the blower motor. Install the fuse and see if it blows. If not, your problem is from the switch to the motor. You may have a wiring problem, or a bad motor. With blower motor disconnected, check power to the harness, both the power side and the ground side. This will eliminate the switch as the problem.

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Two different problems. Check the linkage between the ignition switch and the transmission interlock. Also check for a brake-light interlock - if the brake lights don't light when you press the brake pedal, the brake light switch may be the cause of that problem.

As to the fan... are we talking about the heater/AC fan or the radiator cooling fan? Either may be as simple as a blown fuse - check the fuseblock under the hood.

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Aug 12, 2014 | 1998 Mercury Mystique

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Blower motor stays on when car is off 1999 mercury mystique


The Mercury Mystique had somewhat of a bad reputation for wiring problems. I guess my question to you is have you had to have the wiring worked on?? If so, I'd guess that it would be pretty possible for a wire to be hooked up wrong at the ignition switch if somebody has been fooling with that. Just a thought... Also, I'm wondering if the fan continues to run until your battery goes dead?? Now, I'm hoping you don't have the blower motor (for the heater and air conditioner) confused with the electric engine cooling fan. It is normal for the engine fan to run for a while after you shut your engine off. But, I'm probably telling you things you already know along that line.

Dec 06, 2013 | Mercury Mystique Cars & Trucks

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Where is the resistor pack located that is in the heater circuit, for a 1998 mercury Mistique?


Might be the Resistor pack located close to the blower. Could be under the dash or under the hood, but always close to the blower itself. Usually has a flat connector with 4 or 5 wires, and two small screws holding in the duct. It may be a crispy critter. It happens... The blower moves air across it to keep it cool. The blower motor may be bad as well, or possibly the fan speed switch. May very well be the fuse for the blower as well. The blower connector may be loose. Let me know what you find.

Dec 02, 2012 | 1998 Mercury Mystique

1 Answer

1998 Mercury Mystique heater blower motor doesn't work. Have replaced everything and checked both fuses (both good). What next?


Don't know how the ABS light would be related to the blower motor, you said you checked everything - did you check the blower motor circuit for power and ground with a meter or a test light ?
Is the resistor getting power from the relay ?

Oct 16, 2012 | 1998 Mercury Mystique

1 Answer

How easy is to replace the oil pan in a 1998 mercury mystique a mechanic told me he would have to raise the motor to change it, is this true.


Yes its true, many things to disconnect raise the engine, best leave it to a garage of your choice as its not a pretty sight when doing it.

Oct 12, 2010 | 1998 Mercury Mystique

2 Answers

I have shorted out the electrical system in a 1998 mercury mystique. I still have somethings like the horn, headlights and dashlights but not the power locks, windows, brake lights, signal lights etc. \it...


Check all of the fuses located in the black box under the hood close to the battery on top of the inner fender. All power to the car begins there. Check for large fuses 30 amp to 60 amp. Make sure the heater fan is left unplugged. When working on components under the dash always disconnect the ground cable from the battery

Jun 14, 2017 | 1998 Mercury Mystique

1 Answer

1998 Mystique brake lights don't work while the window brake light does work.


Try a continuity test, not sure where to find the electrical scheme but if you obtain it, use a tester or borrow one to test the continuity of the wires of both taillights, could be simple as a cut wire.

May 24, 2009 | 1998 Mercury Mystique

1 Answer

1998 mercury mystique odd starting problem


I i were you i would check the ignition. it sounds like you are only connecting some of the time. And yes it is very normal to hear the fuel pump kick on when you turn the key to the on position.

Jan 08, 2009 | 1998 Mercury Mystique

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